Nerves 1

Question 1

Nervous System: Divisions

Answer 1

Central [brain/spinal] / Peripheral [nerves outside CNS]

Question 2

Afferent Nerve

Answer 2

[sensory] periphery of body TO brain/spinal

Question 3

Efferent Nerve

Answer 3

[motor] FROM brain/spinal to periphery

Question 4

Autonomic NS

Answer 4

part of PNS, operates w/o conscious control

Question 5

Sympathetic NS

Answer 5

subdivision of Autonomic NS, “fight or flight”

Question 6

Parasympathetic NS

Answer 6

subdivision of Autonomic, “rest and digest”, returns body to normal state

Question 7

Cranial Nerves

Answer 7

Olfactory, Optic, Oculomotor, Trochlear, Trigeminal, Abducens, Facial, Vestibulocochlear, Glossopharyngeal, Vagus, Accessory Hypoglossal

Question 8

Olfactory

Answer 8

[1] transmits smell; *afferent

Question 9

Optic

Answer 9

[2] transmits sight; *afferent

Question 10

Oculomotor

Answer 10

[3] moves eyeball; *efferent

Question 11

Trochlear

Answer 11

[4] moves eye; *efferent

Question 12

Trigeminal

Answer 12

[5] largest! most important for dental! 3 divisions serving teeth, tongue, oral cavity and skin of face/head; *afferent + efferent

Question 13

3 Divisions of Trigeminal

Answer 13

Ophthalmic [V1], Maxillary [V2], Mandibular [V3]

Question 14

Ophthalmic Nerve

Answer 14

[V1] enters through Superior Orbital Fissure *sensory

Question 15

Maxillary Nerve

Answer 15

[V2] enters by foramen rotundum *sensory

Question 16

Mandibular Nerve

Answer 16

[V3] enters by foramen ovale *sensory + motor

Question 17

Abducens

Answer 17

[6] moves eye *efferent

Question 18

Facial

Answer 18

[7] supplies muscles of facial expression, exits through Stylomastoid Foramen. Has 2 branches. *afferent + efferent

Question 19

Greater Petrosal

Answer 19

[facial branch] efferent = lacrimal/nasal/minor salivary ; afferent = taste sensation to palate

Question 20

Chorda Tympani

Answer 20

[facial branch] efferent = submandibular/sublingual ; afferent = taste from body of tongue

Question 21

Vestibuloccochlear

Answer 21

[8] hearing + balance *afferent

Question 22

Glossopharygeal

Answer 22

[9] efferent = pharnygeal and stylopharyngeal ; afferent = base of the tongue

Question 23

Vagus

Answer 23

[10] efferent = soft palate, pharynx, larynx, thorax, to stomach ; afferent = small, ear sensation

Question 24

Accessory

Answer 24

[11] exits through jugular foramen. *efferent = SCM, trapezius, soft palate, pharynx

Question 25

Hypoglossal

Answer 25

[12] motor innervation of tongue muscles, exits through hypoglossal canal *efferent = intrinsic/extrinsic tongue muschles